Subject: Re: [Bluez-devel] Nokia 770 and bluetooth audio
From: Marcel Holtmann <marcel@holtmann.org>
To: bluez-devel@lists.sourceforge.net
In-Reply-To: <4348AF2B.4030301@xmission.com>
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Date: Sun, 09 Oct 2005 11:14:40 +0200

Hi Brad,

> > if I am not mistaken, then the integration into GStreamer will solve all
> > the problems. However we need a good SBC encoder for this first. May you
> > wanna give an update on its current status.
> 
> Victor's changes to our encoder give reasonable performance on arm (<10% 
> of cpu on an arm9 400mhz I think). It uses 64-bit integer math and we 
> expect there is room for even more optimization using a lossier 32-bit 
> version (the 32-bit stuff is stubbed out but disabled for now since it's 
> incomplete)

from what other people told me about SBC, a 32-bit version will be
enough for good quality audio.

> In addition to switching to integer ops, Victor unrolled loops and 
> reworked some of the tables so less stuff has to be computed at runtime.

I also heard that there are a lot of possible optimizations, because the
example code in the specification sucks totally.

Regards

Marcel


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